keyword
MENU ▼
Read by QxMD icon Read
search

Coils

keyword
https://www.readbyqxmd.com/read/29458185/tiny-cerebral-aneurysms-can-be-safely-and-effectively-treated-with-lvis-stent-assisted-coiling-or-coiling-alone
#1
Bu-Lang Gao, Tian-Xiao Li, Li Li, Gang-Qin Xu, Bo-Wen Yang
BACKGROUND: The effect and safety of LVIS stent-coiling is currently not known for treating tiny intracranial aneurysms. OBJECTIVE: To investigate the effect and safety of LVIS stent-assisted coiling and coiling alone in treating patients with mostly ruptured tiny aneurysms. METHODS: Seventy-five patients with tiny intracranial aneurysms including 63 ruptured ones were treated endovascularly and analyzed. RESULTS: In the coiling group, complete occlusion was achieved in 35 patients (83...
February 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29458023/structural-characterization-of-the-hcov-229e-fusion-core
#2
Wei Zhang, Qianqian Zheng, Mengrong Yan, Xiaobo Chen, Haitao Yang, Weihong Zhou, Zihe Rao
HCoV-229E spike (S) protein mediates virion attachment to cells and subsequent fusion of the viral and cellular membranes. This protein is composed of an N-terminal receptor-binding domain (S1) and a C-terminal trans-membrane fusion domain (S2). S2 contains a highly conserved heptad repeat 1 and 2 (HR1 and HR2). In this study, the HRs sequences were designed and connected with a flexible linker. The recombinant fusion core protein was crystallized and its structure was solved at a resolution of 2.45 Å. Then we characterized the binding of HR1s and HR2s via both sequence alignment and structural analysis...
February 16, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29457589/short-term-efficacy-of-pipeline-embolization-device-for-treating-complex-intracranial-aneurysms
#3
NiZaMiDingJiang ReXiaTi, ReXiDan AiKeReMu, KaHeErMan KaDeEr, Yan-Dong Fan, Zhao-Hai Feng, Kai Wang, TeWuErBaTi SuErTanNiYa, Tao-Tao Dou, Hai-Qiang Wu, MaiMaiTiLi AiSha, Xiao-Jiang Cheng
OBJECTIVE: To observe the short-term efficacy of Pipeline embolization divice (PED) for the treatment of complex intracranial aneurysms. METHODS: The clinical data of 29 consecutive patients with 32 intracranial aneurysms treated with PED between April 2015 to September 2016 were analyzed retrospectively. There were 3 small aneurysm, 15 large aneurysms, 8 giant aneurysms, 5 fusiform ayneurysms and 1 recidivation. The vessels include 25 anterior circulation and 4 posterior circulation...
2018: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/29456554/compound-heterozygous-variants-in-the-coiled-coil-domain-containing-40-gene-in-a-chinese-family-with-primary-ciliary-dyskinesia-cause-extreme-phenotypic-diversity-in-cilia-ultrastructure
#4
Lin Yang, Santasree Banerjee, Jie Cao, Xiaohong Bai, Zhijun Peng, Haixia Chen, Hui Huang, Peng Han, Shunyu Feng, Na Yi, Xueru Song, Jing Wu
Purpose: Primary ciliary dyskinesia (PCD) is a rare genetic disorder manifested with recurrent infections of respiratory tract and infertility. Mutations in more than 20 genes including the Coiled-Coil Domain Containing 40 ( CCDC40 ) gene are associated with PCD. A Chinese proband with a clinical diagnosis of PCD was analyzed for mutations in these genes to identify the genetic basis of the disease in the family. The proband showed altered mucociliary clearance of the airways, various degree of hyperemia and edema of the mucous membrane, left/right body asymmetry, infertility and ultrastructural abnormality of cilia in both sperm and bronchioles...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29456260/rf-safety-evaluation-of-a-breast-tissue-expander-device-for-mri-numerical-simulation-and-experiment
#5
Bu S Park, Amir Razjouyan, Leonardo M Angelone, Brent McCright, Sunder S Rajan
This study describes the MRI-related radio frequency (RF) safety evaluation of breast tissue expander devices to establish safety criteria. Numerical simulations and experimental measurements were performed at 64 MHz with a gel phantom containing a breast expander. Additionally, computational modeling was performed (64 and 128 MHz) with an adult female model, containing a virtually implanted breast tissue expander device for four imaging landmark positions. The presence of the breast tissue expander device led to significant alterations in specific absorption rate (SAR) and|B1 + |distributions...
October 2017: IEEE Transactions on Electromagnetic Compatibility
https://www.readbyqxmd.com/read/29456259/improvement-of-electromagnetic-field-distributions-using-high-dielectric-constant-hdc-materials-for-ctl-spine-mri-numerical-simulations-and-experiments
#6
Bu S Park, Brent McCright, Leonardo M Angelone, Amir Razjouyan, Sunder S Rajan
This study investigates the use of pads with high dielectric constant (HDC) materials to alter electromagnetic field distributions in patients during magnetic resonance imaging (MRI). The study was performed with numerical simulations and phantom measurements. An initial proof-of-concept and validation was performed using a phantom at 64 MHz, showing increases of up to 10% in electromagnetic field when using distilled water as the high dielectric material. Additionally, numerical simulations with computational models of human anatomy were performed at 128 MHz...
October 2017: IEEE Transactions on Electromagnetic Compatibility
https://www.readbyqxmd.com/read/29456156/a-multilayer-coil-in-type-i-counter-current-chromatography
#7
Yi Yang, Jiao Yang, Chen Fang, Dongyu Gu, Ying Ma, Yoichiro Ito
In the present study, a novel model of type-I counter-current chromatography was developed to simplify the separation column manufacture and extend its application ranges. In this system, a multilayer coil was used as the separation column of type-I counter-current chromatography for the first time. The chromatographic performance of this apparatus was evaluated in terms of retention of the stationary phase (Sf), theoretical plate (N) and peak resolution (Rs) using dipeptides and DNP-amino acids as test samples with two classic solvent systems composed of 1-butanol-acetic acid-water (4:1:5, v/v) (BAW) and hexane-ethyl acetate-methanol-0...
February 13, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29455822/pulmonary-hemorrhage-due-to-unrecognized-bronchial-collateral-after-arterial-switch-operation
#8
Sreelakshmi P Leeladharan, Jessin P Jayashankar, Brijesh P Kottayil, Mahesh Kappanayil, Krishnakumar Raman, Rakhi Balachandran
We report a neonate with transposition of great arteries and intact ventricular septum who had a massive pulmonary hemorrhage soon after an arterial switch operation. An emergency cardiac catheterization revealed a large bronchial collateral artery from the descending aorta feeding the right lung. The hemorrhage was controlled by coil embolization of the collateral, and the patient recovered after prolonged intensive care.
March 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29455821/pulmonary-hemorrhage-after-arterial-switch-operation
#9
Madan M Maddali, Salim N Al-Maskari, Pranav S Kandachar, Francois Lacour-Gayet
Major aortopulmonary collateral arteries can influence the postoperative course of arterial switch operation, with heart failure being the common clinical presentation. A relatively rare presentation of an aortopulmonary collateral artery in the form of persistent postoperative pulmonary hemorrhage was encountered after an uneventful arterial switch operation in a neonate with transposition of the great arteries, intact interventricular septum, and situs inversus totalis. The aortopulmonary collateral artery was coil embolized with a successful outcome...
March 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29455820/ductus-aneurysm-ruptured-into-the-esophagus-with-massive-bleeding
#10
Takeshi Soeda, Mai Sakashita, Takamitsu Hamada, Yuhei Saito, Yasuhito Kitakado, Nobuo Morioka
We report a patient with life-threatening hematemesis caused by the rupture of a ductus aneurysm into the esophagus, which was successfully treated by coil embolism for the esophageal fistula through the aorta and subsequent thoracic endovascular aortic replacement. Second-stage therapy was performed surgically after proactive antibiotic treatment and in consideration of the patient's improved general condition. This included debridement with drainage, aortic encasement with remnant aneurysmal wall, omentopexy, and jejunostomy...
March 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29455454/oxidative-capacity-varies-along-the-length-of-healthy-human-tibialis-anterior
#11
Andreas Boss, Linda Heskamp, Vincent Breukels, Lauren J Bains, Mark J van Uden, Arend Heerschap
The rate of phosphocreatine (PCr) recovery (kPCr ) after exercise, characterizing muscle oxidative capacity, is traditionally assessed with unlocalized31 P magnetic resonance spectroscopy (MRS) using a single surface coil. However, because of intramuscular variation in fibre type and oxygen supply, kPCr may be non-uniform within muscles. We tested this along the length of the tibialis anterior (TA) muscle in 10 male volunteers. For this purpose we employed a 3T MR system with a31 P/1 H volume transmit coil combined with a home-built31 P phased-array receive probe, consisting of 5 coil elements covering the TA muscle length...
February 18, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29455326/new-tetrameric-forms-of-the-rotavirus-nsp4-with-antiparallel-helices
#12
Sushant Kumar, Raghavendra Ramappa, Kiranmayee Pamidimukkala, C D Rao, K Suguna
Rotavirus nonstructural protein 4, the first viral enterotoxin to be identified, is a multidomain, multifunctional glycoprotein. Earlier, we reported a Ca2+ -bound coiled-coil tetrameric structure of the diarrhea-inducing region of NSP4 from the rotavirus strains SA11 and I321 and a Ca2+ -free pentameric structure from the rotavirus strain ST3, all with a parallel arrangement of α-helices. pH was found to determine the oligomeric state: a basic pH favoured a tetramer, whereas an acidic pH favoured a pentamer...
February 17, 2018: Archives of Virology
https://www.readbyqxmd.com/read/29454055/optimization-chain-conformation-and-characterization-of-exopolysaccharide-isolated-from-leuconostoc-mesenteroides-drp105
#13
Hanwen Xing, Renpeng Du, Fangkun Zhao, Ye Han, Huazhi Xiao, Zhijiang Zhou
Response surface methodology (RSM) was used to optimize the fermentation condition of exopolysaccharide (EPS) producing strain Leuconostoc mesenteroides DRP105. Result showed that the optimum condition was sucrose 86.83 g/L, tryptone 15.47 g/L, initial pH 7.18 and maximum yield was 53.79 ± 0.78 g/L in 36 h fermentation. Chain conformation was characterized by Congo red test, β-elimination and circular dichroism (CD), which indicated that the EPS was O-linkage and exhibited random coil structure in aqueous solution...
February 14, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29453904/synthesis-self-assembly-and-photoresponsive-liquid-crystals-based-on-azobenzene-derivatives
#14
Hongyan Wang, Yi Han, Wei Yuan, Mengjiao Wu, Yulan Chen
A new class of rod-coil-rod molecules with an azobenzene core were synthesized. They were found to form robust organogels in several kinds of organic solvents. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), FT-IR spectroscopy, UV-vis absorption spectroscopy, 1H NMR, and X-ray diffraction (XRD) revealed that in these organogels, the molecules self-assembled into nanofiber network with an H-type aggregation mode under the joint effect of Pi-Pi stacking, intermolecular hydrogen bonding, and van der Waals forces...
February 17, 2018: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/29453516/the-coiled-spring-sign-of-appendiceal-intussusception
#15
REVIEW
Sergey Leshchinskiy, Robert D'Agostino
No abstract text is available yet for this article.
February 16, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29453324/incidence-and-predictors-of-perioperative-complications-with-transvenous-lead-extractions-real-world-experience-with-national-cardiovascular-data-registry
#16
Nitesh Sood, David T Martin, Rachel Lampert, Jeptha P Curtis, Craig Parzynski, Jude Clancy
BACKGROUND: Transvenous lead extraction is an integral part of management of patients with cardiovascular implantable electronic devices. Real-world incidence and predictors of perioperative complications in extractions involving implantable cardioverter-defibrillator leads have not been described in detail. METHODS AND RESULTS: Data from the National Cardiovascular Data Registry Implantable Cardioverter-Defibrillator Registry were analyzed. Lead extraction was defined as removal of leads implanted for >1 year...
February 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29453214/renal-nutcracker-syndrome-in-a-young-lady-unusual-findings-and-endovascular-management
#17
Manish Taneja, Benjamin Soo Yeng Chua, Kanika Daga
Nutcracker syndrome (NCS) is caused by compression of left renal vein (LRV), usually between the aorta and the superior mesenteric artery (SMA). This can lead to obstruction of flow into the inferior vena cava and secondary left renal venous hypertension. Despite potential serious consequences, diagnosing NCS is often challenging, circuitous and commonly delayed. We report an extremely unique case of NCS. A 34-year-old woman presented with left flank pain and discomfort. On investigation, it was found that high pressure in the LRV, due to compression by the SMA, had led to a large venous aneurysm that had caused pelviureteric junction obstruction and hydronephrosis...
February 16, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29451801/patterns-of-carbon-nanotubes-by-flow-directed-deposition-on-substrates-with-architectured-topographies
#18
Mohammad Khalid Jawed, Nicolas G Hadjiconstantinou, David Parks, Pedro M Reis
We develop and perform continuum mechanics simulations of carbon nanotube (CNT) deployment directed by a combination of surface topography and rarefied gas flow. We employ the Discrete Elastic Rods method to model the deposition of CNT as a slender elastic rod that evolves in time under two external forces, namely van der Waals (vdW) and aerodynamic drag. Our results confirm that this self-assembly process is analogous to a previously studied macroscopic system, the `elastic sewing machine', where an elastic rod deployed onto a moving substrate forms nonlinear patterns...
February 16, 2018: Nano Letters
https://www.readbyqxmd.com/read/29450110/quantitative-analyses-of-the-equilibria-among-dna-complexes-of-a-blue-light-regulated-bzip-module-photozipper
#19
Yoichi Nakatani, Osamu Hisatomi
Aureochrome1 is a blue-light-receptor protein identified in a stramenopile alga, Vaucheria frigida . Photozipper (PZ) is an N-terminally truncated, monomeric, V. frigida aureochrome1 fragment containing a basic leucine zipper (bZIP) domain and a light-oxygen-voltage (LOV)-sensing domain. PZ dimerizes upon photoexcitation and consequently increases its affinity for the target sequence. In the present study, to understand the equilibria among DNA complexes of PZ, DNA binding by PZ and mutational variants was quantitatively investigated by electrophoretic-mobility-shift assay and fluorescence-correlation spectroscopy in the dark and light states...
2018: Biophysics and Physicobiology
https://www.readbyqxmd.com/read/29449282/a-patient-dose-reduction-technique-for-neuroendovascular-image-guided-interventions-image-quality-comparison-study
#20
A Sonig, S V Setlur Nagesh, V S Fennell, S Gandhi, L Rangel-Castilla, C N Ionita, K V Snyder, L N Hopkins, D R Bednarek, S Rudin, A H Siddiqui, E I Levy
BACKGROUND AND PURPOSE: The ROI-dose-reduced intervention technique represents an extension of ROI fluoroscopy combining x-ray entrance skin dose reduction with spatially different recursive temporal filtering to reduce excessive image noise in the dose-reduced periphery in real-time. The aim of our study was to compare the image quality of simulated neurointerventions with regular and reduced radiation doses using a standard flat panel detector system. MATERIALS AND METHODS: Ten 3D-printed intracranial aneurysm models were generated on the basis of a single patient vasculature derived from intracranial DSA and CTA...
February 15, 2018: AJNR. American Journal of Neuroradiology
keyword
keyword
55953
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"